finding the average of each 100 points out of 1000000 data points?

1-I have a wave that returns 1000000 data points in an array of elements, and i want to find the average of each 100 points of the 1000000, which means that i should expect an array of 1000000/100 = 10000 elements.

2- say that the image below is at highest 2v but when you zoom in you find that that some data points that look at HIGH level are very much below 2v and at LOW level, so i want to find average overall and a smooth square wave that consists of either HIGH or LOW (square-wave) .

Hope i can find some answers or ideas!

Answer 1

[Guillaume]

For 1.:

avgwave = mean(reshape(yourwavevector, 100, []));

I have no idea what it is you're asking with 2.

[Mussab Elharan]

Thanks for your above given answer!

As for the second question what i am looking for is kind of smoothing/filtering to the wave i have above,

 so that the final results of wave becomes something like the image attached below: